diff --git a/examples/image2ascii.cpp b/examples/image2ascii.cpp
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+/*
+ #
+ #  File        : image2ascii.cpp
+ #                ( C++ source file )
+ #
+ #  Description : A basic image to ASCII-art converter.
+ #                This file is a part of the CImg Library project.
+ #                ( http://cimg.eu )
+ #
+ #  Copyright   : David Tschumperle
+ #                ( http://tschumperle.users.greyc.fr/ )
+ #
+ #  License     : CeCILL v2.0
+ #                ( http://www.cecill.info/licences/Licence_CeCILL_V2-en.html )
+ #
+ #  This software is governed by the CeCILL  license under French law and
+ #  abiding by the rules of distribution of free software.  You can  use,
+ #  modify and/ or redistribute the software under the terms of the CeCILL
+ #  license as circulated by CEA, CNRS and INRIA at the following URL
+ #  "http://www.cecill.info".
+ #
+ #  As a counterpart to the access to the source code and  rights to copy,
+ #  modify and redistribute granted by the license, users are provided only
+ #  with a limited warranty  and the software's author,  the holder of the
+ #  economic rights,  and the successive licensors  have only  limited
+ #  liability.
+ #
+ #  In this respect, the user's attention is drawn to the risks associated
+ #  with loading,  using,  modifying and/or developing or reproducing the
+ #  software by the user in light of its specific status of free software,
+ #  that may mean  that it is complicated to manipulate,  and  that  also
+ #  therefore means  that it is reserved for developers  and  experienced
+ #  professionals having in-depth computer knowledge. Users are therefore
+ #  encouraged to load and test the software's suitability as regards their
+ #  requirements in conditions enabling the security of their systems and/or
+ #  data to be ensured and,  more generally, to use and operate it in the
+ #  same conditions as regards security.
+ #
+ #  The fact that you are presently reading this means that you have had
+ #  knowledge of the CeCILL license and that you accept its terms.
+ #
+*/
+
+// Tell CImg not to use display capabilities.
+#undef cimg_display
+#define cimg_display 0
+#include "CImg.h"
+using namespace cimg_library;
+
+/*---------------------------
+
+  Main procedure
+
+  --------------------------*/
+int main(int argc,char **argv) {
+  cimg_usage("A simple image to ASCII-art converter.\n\nUsage : image2ascii [options] image");
+
+  // Read command line parameters
+  const char *const file_i = cimg_option("-i",(char*)0,"Input image");
+  const char *const geom = cimg_option("-g","79x40","Output size");
+  const int alphabet = cimg_option("-a",0,"Alphabet type (0=full, 1=numbers, 2=letters, 3=signs, 4=minimal");
+  const bool invert = cimg_option("-invert",false,"Invert image intensities");
+  const float contour = (float)cimg_option("-contour",0.0f,"Use image contours higher than specified threshold");
+  const float blur = (float)cimg_option("-blur",0.8f,"Image pre-blur");
+  const float sigma = (float)cimg_option("-sigma",10.0f,"Font pre-blur");
+
+  int w = 79, h = 40;
+  std::sscanf(geom,"%d%*c%d",&w,&h);
+  if (cimg_option("-h",false,0)) std::exit(0);
+
+  // Init fonts
+  CImgList<> font_full = CImgList<>::font(13,false);
+  font_full.remove(0,255);
+  const int fw = font_full['A'].width(), fh = font_full['A'].height();
+  CImgList<> font, font_blur;
+  CImgList<unsigned char> font_code;
+
+  switch (alphabet) {
+  case 1: {
+    font_code.insert(CImg<>::vector(' '));
+    for (unsigned char l='0'; l<='9'; l++) font_code.insert(CImg<>::vector(l));
+  } break;
+  case 2: {
+    font_code.insert(CImg<>::vector(' '));
+    for (unsigned char l='A'; l<='Z'; l++) font_code.insert(CImg<>::vector(l));
+  } break;
+  case 3: {
+    font_code.insert(CImg<>::vector(' '));
+    font_code.insert(CImg<>::vector('-'));
+    font_code.insert(CImg<>::vector('_'));
+    font_code.insert(CImg<>::vector('|'));
+    font_code.insert(CImg<>::vector('/'));
+    font_code.insert(CImg<>::vector('\\'));
+    font_code.insert(CImg<>::vector('+'));
+    font_code.insert(CImg<>::vector('.'));
+    font_code.insert(CImg<>::vector('*'));
+    font_code.insert(CImg<>::vector('='));
+    font_code.insert(CImg<>::vector(']'));
+    font_code.insert(CImg<>::vector('['));
+    font_code.insert(CImg<>::vector('('));
+    font_code.insert(CImg<>::vector(')'));
+    font_code.insert(CImg<>::vector('{'));
+    font_code.insert(CImg<>::vector('}'));
+    font_code.insert(CImg<>::vector('"'));
+    font_code.insert(CImg<>::vector('!'));
+    font_code.insert(CImg<>::vector('$'));
+    } break;
+  case 4: {
+    font_code.insert(CImg<>::vector(' '));
+    font_code.insert(CImg<>::vector('.'));
+    font_code.insert(CImg<>::vector('/'));
+    font_code.insert(CImg<>::vector('\\'));
+    font_code.insert(CImg<>::vector('_'));
+    font_code.insert(CImg<>::vector('_'));
+    font_code.insert(CImg<>::vector('|'));
+    } break;
+  default: { for (unsigned char l=' '; l<='~'; l++) font_code.insert(CImg<>::vector(l)); } break;
+  }
+  cimglist_for(font_code,l) {
+    font.insert(font_full(font_code[l](0)));
+    font_blur.insert(font[l].get_resize(fw,fh,1,1).blur(sigma).normalize(0,255));
+  }
+
+  // Init images
+  CImg<> img;
+  if (!file_i) { float white[3] = { 255,255,255 }; img.assign().draw_text(0,0," CImg\nRocks !",white); }
+  else img.assign(file_i);
+  img.norm().resize(fw*w,fh*h);
+  if (blur) img.blur(blur);
+  if (contour>0) {
+    CImgList<> grad = img.get_gradient("xy",4);
+    img = (grad[0].pow(2) + grad[1].pow(2)).sqrt().normalize(0,100).threshold(contour);
+  }
+  img.normalize(0,255);
+  if (invert) img = 255.0f - img;
+  CImg<unsigned char> dest(w,h,1,1,0);
+
+  // Render ASCII-art image, using a simple correlation method.
+  CImg<> neigh;
+  cimg_forY(dest,y) { cimg_forX(dest,x) {
+    neigh = img.get_crop(x*fw,y*fh,(x + 1)*fw,(y + 1)*fh);
+    float scoremin = 2e28f;
+    unsigned int best = 0;
+    cimglist_for(font_code,l) {
+      const CImg<>& letter = font_blur[l];
+      const float score = (float)((letter - neigh).pow(2).sum());
+      if (score<scoremin) { scoremin = score; best = l; }
+    }
+    dest(x,y) = (unsigned char)best;
+    std::fprintf(stdout,"%c",font_code[dest(x,y)](0));
+  }
+  std::fprintf(stdout,"\n");
+  }
+
+  std::exit(0);
+  return 0;
+}